Roof-plate and attic foul-air vent.



J. L. FRUIN.v ROOF PLATE AND ATTIC FOUL AIR VENT.

APPLICATION FILED SEP'LZE, 1907.

Patented July 6, 1909.

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UNITED JOHN L. FRUIN, OF NEW YORK, N. Y.

ROOF-PLATE AND ATTIC FOUL-AIR VENT.

Specification of Letters Patent.

Patented July 6, 1909.

Application filed September 26, 1907. Serial No. 394,628.

To all whom it may concern:

Be it known that I, JOHN L. FRUIN, a citizen of the United States of America, and a resident of the boron h of Brooklyn, New York city, county anr State of New York, have invented certain new and useful linprovements in Roof-Plate and Attic Foul-Air Vents, of which the following is a specification.

The object of my invention is to provide a roof plate and attic foul air vent which serves the double purpose of ventilating the air space immediately below the roof of a building, and also of keeping the main vent pipe of a building, as it emerges from the roof, from becoming coated with or choked up by hoar frost. The air space to be ventilated may be the space between the inner and outer roofs, or it may be an attic where the roof is single, but in both cases it is important to have the dead air provided with suitable means of escape for sanitary reasons.

In the accompanying drawing Figure 1 is a vertical section showing the main vent pipe in side elevation. Fig. 2 is a top view.

Same letters indicate similar parts in the different figures.

A represents a portion of the roof of a building the space below which is to be vented.

B represents a portion of the main vent pipe of a building.

C is a short cylindrical pipe provided with an annular flange c, surrounding an opening D, through the roof A, and bolted to the roof by the bolts 12. This flanged cylinder is rovided with a number of tapering lugs d: of suitable size and shape to support the upper portion E, of the vent as shown in Fig. 1, so as to leave SU'lllOlBIlll space for the free passage of air in the direction of the arrows.

The upper portion of the vent E, is a sort of drum provided with a hub f, which fits somewhat snugly to the vent pipe B, the opening being filled with suitable packing so as not to interfere with the draft through the cylinder C, and drum E.

It will be thus seen that the device is an exceedingly simple one, consisting practically of but two parts-a cylindrical roof plate and a capping drum. It will be readily under stood that as the air which collects at the top of a building immediately under the roof always contains more or less warmth owing to the fact that hot air rises while the cooler air descends, the constant escaping of this warm air around the upper end of the main vent pipe tends to counteract the chilling of said pipe which would otherwise take place as it emerges above the roof, and thereby tends to prevent the deposition of hoar frost inside said vent pipe, with the consequent liability to checking other inconveniences of said deposit.

I claim:

A roof plate and attic foul air vent which consists of a flanged ipe provided with a number of tapering anges and a venting drum resting on said flanges, and adapted to surround the main vent of the building as it emerges through the roof, and to maintain a current of air escaping from below said roof around said vent pipe, substantially as and for the purposes s ecified.

Signed at New ork city this 21st day of Sept. 1907.

JOHN L. FRUIN.

Witnesses:

W. P. PREBLE, Jr., ANNIE A. HOEHLE. 

